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Battery management system and battery management methodBattery management system and battery management method description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070090798, Battery management system and battery management method. Brief Patent Description - Full Patent Description - Patent Application Claims
CLAIMS OF PRIORITY [0001] This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. .sctn.119 from an application for BATTERY MANAGEMENT SYSTEM AND METHOD FOR MEASURING CELL VOLTAGE OF THE BATTERY earlier filed in the Korean Intellectual Property Office on the 20 Oct. 2005 and there duly assigned Serial No. 10-2005-0099087. BACKGROUND OF THE INVENTION [0002] 1. Technical Field [0003] The present invention relates to a battery management system and a battery management method. More particularly, the present invention relates to a battery management system and method for a vehicle utilizing electrical energy. [0004] 2. Related Art [0005] Vehicles using a gasoline or heavy oil internal combustion engine have caused serious air pollution. Accordingly, various attempts to develop electric or hybrid vehicles have recently been made in order to reduce air pollution. [0006] An electric vehicle uses a battery engine run by electrical energy outputted by a battery. Since the electric vehicle mainly uses a battery formed by one battery pack including a plurality of rechargeable/dischargeable secondary cells, there is merit in that it has no emission gases and less noise. [0007] The term "hybrid vehicle" commonly refers to a gasoline-electric hybrid vehicle which uses gasoline to power an internal combustion engine and an electric battery to power an electric motor. Recently, hybrid vehicles using an internal combustion engine and fuel cells and hybrid vehicles using a battery and fuel cells have been developed. The fuel cells directly obtain electrical energy by generating a chemical reaction while hydrogen and oxygen are continuously provided. [0008] Since battery performance directly affects a vehicle using electrical energy, it is required that each battery cell have superior performance. Also, it is required that a battery management system for measuring voltage and current of the overall battery so as to efficiently manage charging/discharging operations of each battery cell be provided. [0009] The above information is provided only for an enhancement of understanding of the background of the invention, and therefore it may contain information that does not form the prior art already known in this country to a person of ordinary skill in the art. SUMMARY OF THE INVENTION [0010] The present invention has been developed in an effort to provide a battery management system having the advantage of more efficiently measuring battery cell voltage using a small number of elements. [0011] An exemplary embodiment of the present invention provides a battery management system capable of measuring a pack current and a pack voltage while a plurality of cell voltages are measured. The battery management system is coupled to a battery in which a plurality of battery cells are formed as one pack. [0012] The battery includes a first sub-pack having first and second battery cells among the plurality of battery cells, and the battery management system comprises: [0013] first and second relays coupled to respective output terminals of the first and second battery cells of the first sub-pack for transmitting cell voltages to the same in response to respective first and second control signals; [0014] a third relay for transmitting the cell voltage received through one of the first and second relays in response to a third control signal; [0015] a first charging unit for storing the cell voltage transmitted from the third relay; [0016] a fourth relay for transmitting the cell voltage stored in the first charging unit in response to a fourth control signal; and [0017] an A/D converter for converting the transmitted cell voltage of the fourth relay into digital data. [0018] The battery may further include a second sub-pack having third and fourth battery cells among the plurality of battery cells, and the battery management system further comprises: [0019] fifth and sixth relays coupled to respective output terminals of the third and fourth battery cells of the second sub-pack for transmitting cell voltages to the same in response to the respective first and second control signals; [0020] a seventh relay for transmitting the transmitted cell voltage of any one of the fifth and sixth relays in response to the third control signal; [0021] a second charging unit for storing the cell voltage transmitted from the seventh relay; and Continue reading about Battery management system and battery management method... Full patent description for Battery management system and battery management method Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Battery management system and battery management method patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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